Question

[(5/4-3/8)*5/26+1/8*5/26]/30/13

Answer 1

[(5/4-3/8)*5/26+1/8*5/26]/30/13

=[(5/4-3/8+1/8)*5/26]/30/13

=[(5/4-2/8)*5/26]/30/13

=(5/4-1/4)*(5/26)*（13/30)

=1/12